International post would be more so i would add £5 to the price.
Yes it is better. I could post it to you.
Essentially it is the same card with the same architecture so i would hazard a guess @ yes. maybe google around a bit to see if it has been done before.
It's actually a fantastic place. It's HUGE, but it's more like a warehouse without glitzy decorations everywhere. They pass those savings onto their customers. It's a nationwide chain. Not your nation, though =P.